#!/usr/bin/python
# a2s takes in a variable name and re-formats it to a database schema 
# name WITH_UNDERSCORES_ETC
#
# Copyright (C) 2002 Demian L. Neidetcher
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import string
import sys

class a2s:
	def xferA2D(this, lineIn):
		upperLocs = []
		currLoc = 0
		for char in lineIn:
			for upper in string.uppercase:
				if (char == upper):
					upperLocs.append(currLoc)
			currLoc = currLoc + 1

		upperLocs.reverse()
		for upperLoc in upperLocs:
			lineIn = "%s%s%s" % \
				(lineIn[:upperLoc], \
				'_',
				lineIn[upperLoc:])
        return string.upper(lineIn)[:-1]

if __name__=='__main__':
	lines = []
	for inLine in sys.stdin.readlines():
		lines.append(inLine)

	outputLines = []
	a = a2s()
	for line in lines:
		print a.xferA2D(line)

